Lot Tugas 3

/**
 * A class to medel an item (or set of items) in an
 * auction: a lot
 *
 * @author Muhammad Naufaldillah
 * @version 22 October 2020
 */
public class Lot
{
    // A unique identifying number.
    private final int number;
    // A description of the lot.
    private String description;
    // The current highest bid for this lot.
    private Bid highestBid;

    /**
     * Construct a Lot, setting its number and description.
     * @param number The lot number.
     * @param description. A description of this lot.
     */
    public Lot(int number, String description)
    {
        this.number = number;
        this.description = description;
    }

    /**
     * Attempt to bid for this lot. A successful bid
     *  must have a value higher than any existing bid.
     *  @param bid A new bid.
     *  @return true if successful, false otherwise
     */
    public boolean bidFor(Bid bid)
    {
        if(highestBid == null)
        {
            // There is no previous bid.
            highestBid = bid;
            return true;
        }
        else if (bid.getValue() > highestBid.getValue())
        {
            //The bid is better than the previous one.
            highestBid = bid;
            return true;
        }
        else
        {
            //The bid is not better
            return false;
        }
    }

    /**
     * @return A string representation of this lot's details.
     */
    public String toString()
    {
        String details = number + ": " + description;
        if(highestBid != null)
        {
            details += "    Bid:  " + highestBid.getValue();
        }
        else
        {
            details += "    (No bid)";
        }
        return details;
    }

    /**
     * @return The lot's number
     */
    public int getNumber()
    {
        return number;
    }

    /**
     * @return The lot's description
     */
    public String getDescription()
    {
        return description;
    }

    /**
     * @return The highest bid for this lot.
     * This could be null if there is no current bid
     */
    public Bid getHighestBid()
    {
        return highestBid;
    }
}